Advertising mini-billboard



FIG. 1 is a perspective view of an advertising mini-billboard showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an end elevational view thereof; and

FIG. 5 is a bottom plan view thereof.

The broken line disclosure of indicia in FIG. 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design of an advertising mini-billboard, as shown and described. 